... some of the most brilliant Lisp programs I've seen weren't even written by programmers or software engineers; they were written by drafters who were clever at math.

Sure. But those drafters probably weren't on a "we're so much smarter than everyone else, strong typing is for people with weak memories" ego trip. People who know they aren't programming experts tend to be conservative and careful in what they write. People who want to throw away all the guardrails so that they can show what great coders they are... look out.